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Around twelve companies are developing reactors that are a fraction of the size of those at Vogtle, betting that they will be quicker and cheaper to build.

WAYNESBORO, Ga. — Towering over the Savannah River in Georgia, the first nuclear reactors built from scratch in the United States in more than 30 years illustrate the enormous promise of nuclear power — and its most glaring weakness. The two new reactors at the Vogtle nuclear power plant will join two older units to create enough electricity to power 2 million homes, 24 hours a day, without emitting any of the carbon dioxide that is dangerously heating the planet. Sign up for The Morning newslet

The dream of reviving nuclear power in the U.S. rests on a new generation of smaller reactors meant to be easier to build. But major obstacles loom.

There's enough energy in spent uranium fuel to power the U.S. for over a century, but recycling waste was a challenge even in America's atomic glory days.

Enrico Fermi’s Chicago Pile 1 experiment in 1942 launched an atomic age, an unrivaled national laboratory system, fleets of submarines, cancer treatments and